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Posted: Thu 1:34 AM, Jan 17, 2013

Reporter: CBS

Updated: Thu 7:18 AM, Jan 17, 2013

Light Exposure During Pregnancy Important for Development

And a new study in Nature says light exposure during pregnancy is key to a baby's eye development.

Until now, scientists thought that exposure to light after birth was the key.

Researchers studied pregnant mice: some kept in the dark, others exposed to light.

They found only the ones that received light could provide fetuses a crucial protein that develops eyesight.

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